Detection of jet precession in the active nucleus of M 81

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Table 2

Typical uncertainties in the model parameters of the core Gaussians.

	Parameter uncertainties
Freq.	PA^a	F _p ^b	Major^c	Ratio^d
(GHz)	(deg)	(mJy beam^-1)	(mas)

1.7	3	0.3	0.05	0.02
2.3	4	4.5	0.1	0.03
5.0	1.7	1.0	0.03	0.015
8.4	1.5	6.5	0.04	0.02

Notes.

^(a)

Position angle of the Gaussian.

^(b)

Peak intensity.

^(c)

Major axis.

^(d)

Ratio between minor and major axis.

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